** If you are using a Thursby PKard Reader and do not need support for derived credentials you can download the Sub Rosa app at no cost.**

Are you tired of having to take your heavy laptop, tangled charger, and clunky card reader with you on trips? Would you like to be able to quickly read and respond to encrypted emails from home or while on the road?

The U.S. engineered Sub Rosa Pro secure web browser supports web site access from an iPad or iPhone with strong, two-factor authentication using a CAC, PIV, or derived credential (such as Purebred). Sub Rosa Pro is the only mobile browser available that allows you to access Defense Travel Systems (DTS) and sign/encrypt/decrypt email through Outlook Web Access (OWA).Full access to calendaring makes managing and coordinating meetings easier than ever.

Sub Rosa Pro is FIPS 140-2 validated.

Web, web email, portal,and collaboration site access are supported, including Microsoft Outlook Web Access (OWA), Defense Travel Systems (DTS), and SharePoint, for example, U.S. Military AKO, NKO, and AF Portals.

Thursby is the market leader in secure Apple Department of Defense (DoD), government, and highly regulated enterprise integration, delivering the security features absent in native Apple and generic enterprise tools. Thursby is US owned, operated, and General Services Administration (GSA) listed, delivering innovative Apple products and services for three decades.

You can find our quick start guide here -

Thursby technical and commercial support is by real people, over the phone and by email from Arlington, Texas. Please contact us via,, or +1 (817) 478-5070.

Sub Rosa Pro supports industry and U.S. Government standards including ISO 7816, NIST IR 6887, HSPD-12, OMB-11-11, FIPS 140-2, and FIPS 201 (with an approved reader). Most popular smart card types are supported including CAC, Dual Persona CAC, PIV, and PIV-I.

** NOTES **
• Full support for HTML5 and JavaScript (not the same as Java) standards for cross platform secure web access
• Perceived performance depends on Wi-Fi or cell bandwidth, internet “weather” and back-end data center or cloud infrastructure
• Apple's iOS iPad and iPhone operating system DOES NOT support Adobe Flash, Microsoft ActiveX or Oracle Java (not the same as JavaScript)
• Please note that Thursby apps may not function correctly and are not supported on “jail broken” devices for security reasons
• Sub Rosa Pro is an integral part of the Thursby PKard Toolkit secure app development and policy management ecosystem
• The iTunes app is an individual/consumer distribution, custom builds are available for organizations

What’s New

Version 4.0.8

Crash fixes.
Better handling of deleted calendar appointment objects.
Fixed certificate trust issues with My Navy Portal.
Fixed a problem where BUPERS users may encounter "Cannot Open Page" after authenticating.
Added support for IDENTOS Tactivo readers.
Updated bookmark for NSIPS.

Ratings and Reviews

2.6 out of 5
5 Ratings

5 Ratings


Needs Work

This APP has tremendous upside, but still needs some work...
- Conversation mode works fairly well until attempting to move MSGS from Inbox to another Folder... APP crashes...
- When replying to MSG there's no MSG break between the last MSG and the reply MSG...
- Unable to perform AO functions in DTS...

Developer Response ,


If you have already done so, please contact our support team regarding your issues. You can contact them by calling +1 817-478-5070 or emailing


pj645 ,

Used to be great

I have used this app for a while now and prior to now, it worked out wonderfully. I’m not sure what happened, but now I can’t get the email portion to work at all and it just stalls. It would be nice if it was seamless again, but at this point I’d rather have my work computer than go through subrosa.

Developer Response ,

I'm sorry to hear you're having issues with the app. The best way to get this addressed and fixed is to reach out to our support team at +1(817) 478-5070 or We look forward to hearing from you. Best regards, Luke

Mike_Archer77 ,

Needs updating

Worked decent before iOS 13 but now crashes before going to email every single time. Has become useless. This should not occur with a product where $100’s of dollars is spent on both the CaC reader and the pro software. Step up!!!!

Developer Response ,

I am sorry you are having issues with the app. We appreciate your feedback and would like to hear more about the issues you are facing. Please contact our support team at or +1(817) 478-5070. This is the best way to get these address and fixed. We look forward to hearing from you soon. Thank you, Luke


Thursby Software Systems, Inc.
38.6 MB

Requires iOS 8.2 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating
Rated 17+ for the following:
Unrestricted Web Access
Copyright © 2011-2018 Thursby Software Systems, Inc.


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

More By This Developer

You May Also Like